LOW EMISSION FORMALDEHYDE RESIN AND BINDER FOR MINERAL FIBERINSULATION

摘要

A phenol-formaldehyde resole resin is prepared using a high level of catalys t at a polymerization temperature of about 63 degrees C. The endpoint, measure d by salt water tolerance, is selected so that the resulting resin has a water dilutability of 20:1 at neutral pH after storage for three weeks at a temperature of about 13 degrees C, with a free phenol level of no more than 0.50 percent.